diff --git a/gnss/1.0/IGnssNavigationMessage.hal b/gnss/1.0/IGnssNavigationMessage.hal
new file mode 100644
index 0000000..d59b538
--- /dev/null
+++ b/gnss/1.0/IGnssNavigationMessage.hal
@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.gnss@1.0;
+
+import IGnssNavigationMessageCallback;
+
+/*
+ * Extended interface for GNSS navigation message reporting support.
+ */
+interface IGnssNavigationMessage {
+    enum GnssNavigationMessageStatus : int32_t {
+        SUCCESS = 0,
+        ERROR_ALREADY_INIT = -100,
+        ERROR_GENERIC = -101
+    };
+
+    /*
+     * Initializes the interface and registers the callback routines with the HAL.
+     * After a successful call to 'setCallback' the HAL must begin to provide updates as
+     * they become available.
+     * @param callback handle to IGnssNavigationMessageCallack interface.
+     *
+     * @return initRet Returns SUCCESS if the operation
+     * is successful.
+     * Returns ERROR_ALREADY_INIT if a callback has
+     * already been registered without a corresponding call to close().
+     * Returns ERROR_GENERIC if any other error occurred. It is
+     * expected that the HAL will not generate any updates upon returning
+     * this error code.
+     */
+     setCallback(IGnssNavigationMessageCallback callback) generates (int32_t initRet);
+
+    /*
+     * Stops updates from the HAL, and unregisters the callback routines.
+     * After a call to close(), the previously registered callbacks must be
+     * considered invalid by the HAL.
+     * If close() is invoked without a previous setCallback, this function must perform
+     * no work.
+     */
+    close();
+};